package cn.tedu.v5;

import java.io.*;
import java.net.ConnectException;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.Scanner;


public class Client {
    private Socket socket;
    private static final String HOST="127.0.0.1";
    private static final Integer PORT = 4545;
    private String ip;
    private BufferedReader br;
    private PrintWriter pw;
    public Client() {
        try {
            socket = new Socket(HOST, PORT);
            br= new BufferedReader(new InputStreamReader(socket.getInputStream(), "UTF8"));
            pw = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream(), "UTF8")), true);
        } catch (NullPointerException e) {
            System.out.println("友情提示：IP传入错误导致连接失败~");
        } catch (UnknownHostException e) {
            System.out.println("友情提示：IP传入错误");
        } catch (ConnectException e) {
            System.out.println("客户端连接失败：建议检查IP或者端口号");
        } catch (IOException e) {
            System.out.println("客户端链接服务器失败，提示：检查IP/端口");
        }
    }

    public void start() {
        //与服务器端交互---参考Sever
        System.out.println("~~~欢迎使用xx牌QQ聊天室~~~");
        Scanner input=new Scanner(System.in);
            try {
                //1.读入服务器端：”请输入用户名：“
                String severMessage = br.readLine();
                //1.1显示”请输入用户名：“
                System.out.println(severMessage);
                //1.2 用户输入---用户名
                String username = input.nextLine();
                //1.3用户输入的用户名---写出给服务器端
                pw.println(username);

                //2.1读入服务器发来”请输入密码“
                severMessage=br.readLine();
                System.out.println(severMessage);
                //2.2用户输入--密码--写出给服务器端
                String password=input.nextLine();
                pw.println(password);

                //3.登录之后【登陆成功、登录失败】--才可以聊天
                severMessage = br.readLine();
                //字符串方法：startsWith() 返回值 boolean 前缀名称一致 true
                if (severMessage.startsWith("登录成功")){
                    //封一个客户端的：读写流---chat聊天
                    chat();
                }

            } catch (IOException e){
                System.out.println("客户端断开连接了！");
            } finally {
                if (br!=null)
                    try {
                        br.close();
                    } catch (IOException e) {
                        System.out.println("客户端关闭失败");
                    }
                if (pw != null)
                    pw.close();
                if (socket != null && !socket.isClosed()) {
                    try {
                        socket.close();
                    } catch (IOException e) {
                        System.out.println("通讯关闭失败");
                    }
                }
            }
        }

//封装一个针对聊天功能：读写 chat
private void chat(){
    new Thread(() -> {
        try {
            String message;
            while ((message = br.readLine()) != null) {
                System.out.println("服务器端说：" + message);
                System.out.println("客户端请输入：");
            }
        } catch (IOException e) {
            System.out.println("服务器端读入失败了");
        }
    }).start();

    Scanner input = new Scanner(System.in);
    while (true) {
        System.out.println("客户端请输入：");
        String say = input.nextLine();
        pw.println("客户端说：" + say);


    }
}
    public static void main(String[] args) {
        new Client().start();
    }
}
